Ruling pen



C. A. GREEN`AND H. F. SCH/UH.

RULING PEN.

APPLICATION FILED DEC. 29, 1919.

Patented July 4, 1922.

'LQL.

.NMS

CHARLES A. GREEN AND HENRY F. SCHUH, OF CHICAGO, ILLINOIS, ASSIGNORS TO THE C. F. PEASE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

EULING rEiv.

Specification of Letters Patent.

Application filed December 29, 1919. Serial No. 348,177.

To @ZZ whom t may concer/a.:

Be it known that we, CHARLES A. GREEN and HENRY F. SCHUH, citizens of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Ruling Pens, of which the following is a specification. j

This invention relates to new and useful improvements in ruling pens-and more particularly to that type of ruling pen wherein one blade is so connected that it may be swung in the open position for cleaning.

An important object of the invention is to provide means whereby the tension applied against the butt of the swinging blade of the pen may be adjusted.

A further object is to provide a pen of this type wherein the parts are readily assembled and disassembled.

Cther objects and advantages will be apparent through the course 0f the following description.

In the accompanying drawings wherein f for the purpose of illustration is shown a preferred embodiment of my invention and wherein like numerals designate like parts throughout,

Figure 1 is a side elevation partly in section of a ruling pen embodying our invention.

Figure 2 is a view similar to that shown in Figure 1, the swinging blade being elevated.

Figure 3 is a combined view of the workino parts of the pen, and

*igure t is a section taken on the line L1--1 of Figure 2.

Referring now more particularly to the drawings, the numeral 1() indicates a stationary blade. Pivoted to the stationary blade as at 11, is a swinging blade 12 provided at its butt with a cam face 12a. The swinging blade 12 is provided with an adjusting screw 13 of the usual type.

The butt end of the stationary blade 10 is provided with a bore and is internally threaded as at 14 to receive a screw 15 having a central bore 16. The screw is provided with a screw driver receiving notch 17 by means of which it may be adjusted within the butt end of the stationary blade 10.

Mounted within the bore 16 of the screw 15 is a coiled compression spring 18. A plunger pin 19 is provided having a reduced portion 19 forming a shoulder 20. The repin 19 slidably fits the bore 16 of the screw 15.v The outer end of the plunger pin 19 isl provided with an enlarged head 21 which is forced into engagement with thercam face 122l of the-swinging blade 12 by the action of the spring 18. It will be seen that by adjusting the screw 15 within the stationary blade 10, the pressure applied to the swinging blade 12-by means of the plunger pin 19 may be adjusted. This feature is extremely desirable in that the tension placed upon the swinging blade 10 regulates the amount of force which must be applied to turn the adj usting screw 13 by means of which the swinging blade 12 is adjusted with relation to the stationary blade 10. Asis well known to those familiar with the art no two draftsmen prefer the same tension for the swinging blade. Furthermore, the screw 17 may be readily removed and the spring 18 and plunger pin 19 removed therefrom for the purpose of cleaning to' remove collected ink and the like. India ink hardens rapidly and very often interferes with the proper operation of the pen.

A ferrule 22 is provided having an internally threaded bore 23 adapted to receive the projecting end of the screw 15. The opposite end of the ferrule is provided with an eXteriorly threaded portion 24 adapted to receive the handle 25 of the pen. If desired the ferrule 22 may be entirely dispensed with and the handle 25 attached directly to the stationary blade by means of the projecting end of the screw 15. It will be seen that the screw 15 not only provides tension adjustment, but also serves as a means for connecting the blades and the handle.

As many changes are possible in the shape, size, and arrangement of the various parts herein shown and described, we do not limit ourselves to the specific structure herein set forth, but may make any such changes without departing from the spirit of the invention or the scopeof the subjoined claims.

lVhat we claim is:

1. In a ruling pen, a stationary blade having a threaded bore in its butt end, a swinging blade pivotally connected with said stat-ionary blade adjacent said bore and provided adjacent its pivot with a cam face, a member Patented July a, 1922.

mounted Within the bore, a compression spring Within the bore projecting said inember for engagement With said cam face and an externally threaded member extending Within said bore and engaging the spring and having its upper end extending ontwardly -from the butt end of said stationary blade to provide means for attaching a han` dle.

2. ln a ruling pen, a stationary blade haw ing a threaded bore in its butt end, a swinging blade pivotally connected with said stationary blade adjacent said bore and provided adjacent its pivot With a Cam face, a member having acentral bore and provided Withexternal threads, engaging the threads of the bore of said stationary blade, a compression spring mountedn the bore of saidV member, and a plungermounted in the bore of said member and pressed by said spring into engagement with said cam face. t

t 3. In a ruling pen, a stationary blade baving a threaded bore in its bntt'end, a swinging bladepivotally connected with said stationary blade adjacent said bore and provided adjacentits pivot With a cam-law,V a memberhavingva central bore and provided with external threads engaging the threads oi' the bore of said stationary blade a coiled compression spring mounted in the bore of said member, and a plunger mounted in the bore ofA said .member and pressed by said spring into engagement with said cam face, said plunger having a portion slidably fitting said bore, a reducedA lportion extending centrally of the coils of saidspring and an enlarged hea-d4 adapted to engage said cam face. y i

lIn testimony whereof we affix our signatures in presence ,of two Witnesses.

CHARLES A. GREEN y p 'HENRY'R Witnesses: i Y

ANNA KUDANnnn, C. F. Planen. 

